msm6679a-110 Oki Semiconductor, msm6679a-110 Datasheet - Page 24

• Manufacturer Part Number: msm6679a-110
• Description: Si/sd Voice Recognizer, Recorder/player, And Speech Synthesizer
• Manufacturer: Oki Semiconductor

MSM6679A-110 Voice Recognition Processor
Typical Configurations
1.
2.
3.
The MSM6679A-110 supports up to 64 Kbytes of RAM per bank, and up to 64 Kbytes of ROM per
bank in separate memory spaces. The 8-bit data bus is multiplexed with the lower eight address
bits; the upper eight address bits are not multiplexed.
To demultiplex the address and data bits during all read and write cycles, the MSM6679A-110
requires an external octal latch, such as the 74H373. The MSM6679A-110’s Address Latch Enable
(ALE) signal controls the octal latch.
For accessing the ROM and RAM address spaces, the MSM6679A-110 provides the separate
Write RAM (WRRAM), Read RAM (RDRAM), and ROM Read (ROMRD) signals. The RDRAM
and ROMRD signals connect directly to Output Enable (OE) control signal inputs on the RAM
and ROM, respectively. The WRRAM signal connects directly to the Write Enable (WE) control
signal input on the RAM.
The following diagrams show the memory maps for the MSM6679A-110. In all MSM6679A-110
memory maps, the DL data memory space must be in RAM. The DH data memory space and PH
program memory space can either be implemented in ROM, EPROM, FLASH, RAM, or PROM.
In standalone applications, flash memory can be used for recording and subsequent playback of
voice prompts (e.g., the user’s name) and user sounds (e.g., DTMF dial tones, etc.).
Figure 10 shows the configuration for writing to flash memory used when writing SD templates
or when flash is used for data memory.
22
Controller
Telephone
Dialer
Computer
Peripheral
Minimum
Configuration
Application
Phrase chaining features usually permit much longer overall playback durations; not
including external speech synthesizer.
SD recognition vocabularies are volatile in these configurations.
Per download. Vocabulary swapping by host permits unlimited vocabulary size.
Recognition
Vocabulary
61
100
25
50
25
50
75
12
SI
(Words)
[3]
61
61
61
SD
61
61
61
61
61
[2]
[2]
[2]
Sound Playback
Internal External
MSM6679A-110
1.15
2.3
2.3
2.3
2.3
2.3
2.3
2.3
(sec)
[1]
27.6
18.4
36.8
9.2
—
—
—
MSM665x
Playback
Interface
OK
OK
OK
OK
OK
OK
OK
OK
MSM6679A-110
Speech
Record
OK
OK
OK
OK
—
—
—
—
MSM6679A-110
Playback
Speech
OK
OK
OK
OK
OK
OK
OK
—
¡ Semiconductor
EPROM
64K
16K
—
—
Memory Size
(bytes)
Flash SRAM
128K
—
—
—
64-384K
32K
32K
32K